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Mid-infrared high-resolution absorption spectroscopy by use of a semimonolithic entangled-cavity optical parametric oscillator

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Abstract

By recording low-pressure absorption lines of N2O around 3.9 µm, we fully qualify a pulsed entangled-cavity doubly resonant optical parametric oscillator as a power tool for high-resolution spectroscopy. This compact source runs at a high repetition rate >10 kHz with a low threshold of oscillation <8 µJ, is mode-hop-free tunable over 5 cm-1, and displays single-frequency Fourier-transformed-limited operation (linewidth <0.005 cm-1). A high potential for nonlinear spectroscopy is also expected given the high peak power (70 W) and the good quality M2<2 of the output beam.

© 2004 Optical Society of America

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